## Question

`Find the missing number in the series? `

`3, 7, 24, 11, `*_*, 19, 19, …..

`Find the missing number in the series? `

`3, 7, 24, 11, `*_*, 19, 19, …..

A. 21

B. 16

C. 15

D. 13

**Answer: C. 15**

**Solution:**

Two series alternate here, with every third number following a different pattern.

In the main series, **4 is added to each number to arrive the next.**

In alternate series, **5 is subtracted from each number t arrive the next number.**

**Here in the main series**

3 + 4 = 7

7 + 4 = 11

11 + 4 = 15

15 + 4 = 19

**In alternate series**

24 – 5 = 19

19 – 5 = 14…

**Read more:**

**Crack the series missing Number Puzzle ?**

**If 1 1 1 1 = R, 2 2 2 2 = T, 3 3 3 3 = E, 4 4 4 4 = N Then 5 5 5 5 = ?**